Level,DLL 3Probe conductive liquid level LO/HI control

DLL – 3 probe Liquid level Control
3 Modes of operation:-
1. Emptying :– Making the MAX level contact (The MIN should be made as well) energises the relay. Relay de-energises when MIN opens (MAX should not be made at this time).
2. Filling :– MIN and MAX open energises relay. Relay DE-energises when MAX is made.
3. Single level /Tank full control:-
*Permanent short /close Low terminal.
Emptying:-The relay operates when high closes.
Filling:- The relay de-activates (releases) when high closes.